I said I'd "consider an option" not "all proposals are approved." I don't intend to do any work on dual-classing until someone has a serious proposal for a PC that requires me to do so.
Regarding the dragon...
I thought I was pretty clear that this dragon was feral, hateful, etc. I forewarned HARD. I have to arbitrate IC actions, however, and you have the freedom to make bad choices.
I didn't comment on the dice rolls since you already assumed they failed. The lesson learned I would put to this event is that it is important to ask about those kinds of things rather than just assuming and committing dice. (Rolling dice is a commitment to me.) You rolled [2d6] to try and win over the dragon and, to be honest, I have no idea why. If it was a recruiting roll, you can't attempt that until the creature is friendly, you can communicate with it, and you make an offer that actually is enticing. If you were just trying a CHA roll under the house rules for that, a 2d6 roll also only applies when the creature is already friendly. I always forshadow relationship statuses in my IC text - this dragon was clearly "hostile, may attack" which would have been a 6d6 CHA roll for your chosen action. I'm okay saying "if you couldn't pass the 2d6 roll, we'll assume a 6d6 roll also fails." The dragon is clearly forshadowed as hateful (including direct statement by Bulak), feral, and not rational. Had you succeeded on a 6d6 CHA check, I would have allowed its reaction to improve to "Unfriendly" due to gratitude and it would have departed. Otherwise, the likelihood of the dragon flying away is governed by morale checks (which I make, not players) and which the dragon has repeatedly passed... also just not lucky for you this time. The dragon following you like a puppy dog until you tame it is not a realistic possibility.
I'm not sure why you are assuming Morlock is a form of Draconic? It isn't, and that assumption is news to me. Not relevant here, but I want to clarify it for future situations. Morlock is derived from Ellurian, the language of the pre-cataclysmic human mages. Akkara has already been useful because of this.
Dice can be hard. You've been exceptionally lucky in all previous dragon encounters - you've always won initiative and always had good (if not mutliple critical) hits. It WAS possible that you could have won initiative, gotten good bow shots, and neutralized its breath weapon before combat began (as in the previous five dragon encounters). This is turning out very differently, but that's sometimes what happens. You're right in that we live with those choices.